Water inlet assembly and water heater

Abstract

The utility model belongs to the technical field of water heaters, and particularly discloses a water inlet assembly and a water heater. The water inlet assembly comprises an inner pipe and an outer pipe arranged on the outer side of the inner pipe in a sleeving mode at intervals, the water inlet end of the inner pipe protrudes outwards and is provided with an installation boss, the side wall of the first end of the outer pipe is provided with a water outlet, the second end of the outer pipe is closed, the first end of the outer pipe abuts against the installation boss, and the water outlet end of the inner pipe is communicated with an inner cavity of the outer pipe. First convex hulls are arranged on the inner wall of the outer pipe in a protruding mode, at least two first convex hulls are arranged in the circumferential direction of the inner pipe at intervals, and the first convex hulls abut against the inner pipe. The water heater comprises an inner container and the water inlet assembly. According to the water inlet assembly and the water heater, the water inlet stability and smoothness can be improved, the assembling reliability of the water inlet assembly is improved, and then the use experience of the water heater is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water heater technical field especially, relates to a water inlet assembly and water heater. BACKGROUND

[0002] Electric water heater is more common hot water equipment in modern home life, and it can better satisfy the user's water demand for hot water. In order to prevent electric water heater from leaking to water body and causing electric shock accident, the existing electric water heater usually sets up anti-electricity wall structure at water inlet pipe and water outlet pipe, to prolong the inlet and outlet water path, so as to reduce the risk of electric leakage by using the resistance of water body itself.

[0003] The prior art provides a kind of water inlet anti-electricity wall structure, it includes mounting seat, inner tube, outer tube and sealing plug head. Wherein, mounting seat is installed on the body of electric water heater and is used to connect with cold water inlet pipe;Water inlet pipe of inner tube is fixed on mounting seat, and pipe body is inserted into inner container inside;Outer tube is sleeved on the outer side of inner tube and is spaced apart from inner tube, so that water flow channel is formed between inner tube and outer tube;Sealing plug head blocks the port of outer tube, and the side wall of inner tube is provided with water inlet that is connected with inner cavity and water flow channel.

[0004] The water inlet anti-electricity wall structure provided by the prior art, since inner tube and outer tube are both slender structure, when assembling, it is easy to produce deflection and cause the spacing between inner tube and outer tube to be affected, thereby affecting the smoothness of water flow in water inlet anti-electricity wall structure. UTILITY MODEL CONTENTS

[0005] One of the technical problems solved by the utility model is to provide a water inlet assembly, which can effectively solve the deflection of inner tube and outer tube provided by the prior art during assembly, improve water inlet smoothness, and ensure water inlet flow.

[0006] The second technical problem solved by the utility model is to provide a water heater, which can effectively solve the problem of limited use performance of existing water heater caused by limited water inlet flow and low water flow smoothness.

[0007] The first technical problem is solved by the following technical scheme:

[0008] A water inlet assembly, comprising an inner tube and an outer tube spaced apart and sleeved on the outer side of the inner tube, the water inlet end of the inner tube is outwardly protrudingly provided with a mounting boss, the first end side wall of the outer tube has a water outlet and the second end is closed, the first end of the outer tube abuts against the mounting boss, and the water outlet end of the inner tube communicates with the inner cavity of the outer tube;The inner wall of the outer tube is protrudingly provided with a first convex bundle, at least two first convex bundles are spaced apart along the circumference of the inner tube, and the first convex bundle abuts against the inner tube.

[0009] Compared with the prior art, the water inlet assembly of this utility model has the following advantages: by providing a first protrusion on the inner wall of the outer pipe, and the first protrusion abutting against the inner pipe, the coaxiality of the inner and outer pipes is ensured during the assembly of the inner and outer pipes through the abutment of the first protrusion against the inner pipe, effectively preventing the inner and outer pipes from being misaligned during assembly and improving the smoothness of water flow between the inner and outer pipes; at the same time, by providing an installation boss at the water inlet end of the inner pipe, and the first end of the outer pipe abutting against the installation boss, the assembly positioning of the inner and outer pipes can be further realized, improving the reliability of the assembly.

[0010] In one embodiment, the first convex bulge is integrally formed with the body of the outer tube;

[0011] And / or, the first convex hull is an arc-shaped convex hull;

[0012] And / or, the distance between the first convex bulge and the water outlet end of the inner tube is d, 5mm≤d≤50mm.

[0013] In one embodiment, the first end of the outer tube extends radially outward with a positioning boss, which abuts against the mounting boss.

[0014] And / or, the inner tube includes a main pipe section, the water inlet end of the main pipe section is provided with a insert section and the mounting boss protruding radially outward, one end of the insert section is connected to the mounting boss, and the first end of the outer tube is sleeved on the insert section.

[0015] In one embodiment, the outer tube includes a tube body with open ends and an end plate disposed at one end of the tube body. The tube body has the first protrusion and the water outlet. The end plate is welded to the tube body or detachably sealed.

[0016] And / or, the water outlet end of the inner tube is open, and the closed end of the outer tube is spaced apart from the water outlet end of the inner tube.

[0017] In one embodiment, the water inlet assembly further includes a water guide shroud, the first end of which is open, the outer tube passes through the second end of which is open, and the outlet is located inside which is open.

[0018] In one embodiment, the water guide cover includes a mounting sleeve and a flow guide cover coaxially connected. The flow guide cover is open at one end away from the mounting sleeve. The cross-sectional area of ​​the flow guide cover is larger than that of the mounting sleeve. The outer tube is sealed through the mounting sleeve and the water outlet is located inside the flow guide cover.

[0019] In one embodiment, the inner wall of the mounting sleeve is provided with a second protrusion, and the outer wall of the outer tube is recessed inward with a positioning groove, and the second protrusion is engaged in the positioning groove.

[0020] In one embodiment, the side wall of the mounting sleeve has a retaining plate portion, one end of which near the flow guide portion is connected to the main structure of the mounting sleeve, and the other end of which is freely disposed. The second protrusion protrudes from the inner side of the retaining plate portion.

[0021] In one embodiment, the water inlet assembly further includes a mounting housing having a through water inlet channel, and the water outlet end of the mounting housing having a positioning annular groove surrounding the water inlet channel, with the mounting boss inserted into the positioning annular groove.

[0022] The second technical problem mentioned above is solved by the following technical solution:

[0023] A water heater includes an inner tank and a water inlet assembly as described above, wherein both the inner pipe and the outer pipe are located inside the inner tank.

[0024] Compared with the prior art, the water heater described in this utility model has the following advantages: by adopting the above-mentioned water inlet component, the smoothness and stability of water inlet can be improved, the water inlet flow rate can be guaranteed, and the structure of the water heater can be simplified, thereby reducing the cost of the water heater. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the water inlet assembly provided in Embodiment 1 of this utility model;

[0026] Figure 2 A cross-sectional view of the water inlet assembly provided in Embodiment 1 of this utility model;

[0027] Figure 3 for Figure 2 A magnified view of a section at point I;

[0028] Figure 4 for Figure 2 A magnified view of a section at point J;

[0029] Figure 5 for Figure 4 A magnified view of a section at point K;

[0030] Figure 6 This is a schematic diagram of the structure of the outer tube provided in Embodiment 1 of this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the water guide cover provided in Embodiment 1 of this utility model;

[0032] Figure 8for Figure 7 A magnified view of a section at point L;

[0033] Figure 9 A cross-sectional view of the water inlet assembly provided in Embodiment 2 of this utility model;

[0034] Figure 10 for Figure 9 A magnified view of a section at point M;

[0035] Figure 11 This is a cross-sectional view of the water heater provided in Embodiment 3 of this utility model.

[0036] Label Explanation:

[0037] 100. Inlet water assembly; 200. Outlet water assembly; 300. Inner tank;

[0038] 1. Inner tube; 11. Main tube section; 12. Mounting boss; 13. Insertion section;

[0039] 2. Outer pipe; 21. Pipe body; 211. Outlet; 22. End plate; 23. First protrusion; 24. Positioning boss; 25. Positioning groove;

[0040] 3. Install the outer casing; 31. Water inlet channel; 32. Positioning ring groove;

[0041] 4. Water guide cover; 41. Flow guide cover part; 42. Mounting sleeve part; 421. Clamping plate part; 422. Second protrusion; 43. Protruding rib part;

[0042] 5. Water flow channel. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] Example 1

[0048] This embodiment provides a water inlet component 100, which can be applied to a water heater to enable cold water to enter the water heater while simultaneously implementing a water inlet leakage prevention feature, thereby improving the safety and user experience of the water heater.

[0049] like Figures 1 to 3 As shown, specifically, the water inlet assembly 100 includes an inner tube 1 and an outer tube 2 spaced out from the outside of the inner tube 1. The inner tube 1 has open ends with a mounting boss 12 protruding outwards at the water inlet end. The outer tube 2 has an outlet 211 on its first end and a closed end. The first end of the outer tube 2 abuts against the mounting boss 12, and the outlet end of the inner tube 1 communicates with the inner cavity of the outer tube 2. The inner wall of the outer tube 2 has a first protrusion 23 protruding from it. At least two first protrusions 23 are spaced apart along the circumference of the inner tube 1, and the first protrusions 23 abut against the inner tube 1.

[0050] The water inlet assembly 100 provided in this embodiment has a first protrusion 23 protruding from the inner wall of the outer pipe 2, and the first protrusion 23 abuts against the inner pipe 1. During the assembly of the inner pipe 1 and the outer pipe 2, the abutment between the first protrusion 23 and the inner pipe 1 ensures the coaxiality of the inner pipe 1 and the outer pipe 2, effectively preventing the inner pipe 1 and the outer pipe 2 from being misaligned during assembly, and improving the smoothness of water flow between the inner pipe 1 and the outer pipe 2. At the same time, by setting a mounting boss 12 at the water inlet end of the inner pipe 1, and the first end of the outer pipe 2 abutting against the mounting boss 12, the assembly positioning of the inner pipe 1 and the outer pipe 2 can be further realized, improving the assembly reliability of the two.

[0051] like Figure 2 and Figure 4As shown, to enable the water inlet assembly 100 to be installed on the machine body, the water inlet assembly 100 also includes a mounting housing 3. The mounting housing 3 has a water inlet channel 31 that extends through both ends. The water inlet end of the inner tube 1 is installed on the mounting housing 3, and the water inlet channel 31 communicates with the inner cavity of the inner tube 1. Specifically, the water outlet end of the mounting housing 3 is provided with a positioning annular groove 32 surrounding the water inlet channel 31. The mounting boss 12 is installed in the positioning annular groove 32, thereby realizing the installation positioning of the mounting housing 3 and the inner tube 1, improving installation reliability and installation accuracy.

[0052] The mounting housing 3 and the inner tube 1 are preferably welded together to better ensure the installation stability and reliability of the mounting housing 3 and the inner tube 1. In other embodiments, the mounting housing 3 and the inner tube 1 can be connected by threaded screws, or they can be installed by snap-fit ​​or other fixing methods.

[0053] The outer side of the water inlet end of the mounting housing 3 is provided with a first external thread for connection with the water inlet pipe, and the outer side wall of the water outlet end of the mounting housing 3 is provided with a second external thread for connection with the body of the water heater. The specific structure of the mounting housing 3 and the connection structure between the mounting housing 3 and the body and the water inlet pipe can be set with reference to the prior art, which is not the focus of this utility model and will not be described in detail here.

[0054] like Figure 2 , Figure 3 and Figure 6 As shown, the outlet end of the inner pipe 1 is open, and the outlet end of the inner pipe 1 and the closed end of the outer pipe 2 are spaced apart. This allows the water in the inner pipe 1 to flow directly from the open outlet end of the inner pipe 1 to the water flow channel 5 between the inner pipe 1 and the outer pipe 2. There is no need to open an additional opening on the inner pipe 1 to connect the inner cavity of the inner pipe 1 and the water flow channel 5, which reduces the processing difficulty of the inner pipe 1 and ensures the smooth flow of water from the inner pipe 1 to the water flow channel 5.

[0055] In one embodiment, the first protrusion 23 is integrally formed with the tube body 21 of the outer tube 2. Optionally, the first protrusion 23 is formed by stamping the outer tube 2 inward, which improves the processing convenience of the outer tube 2 and ensures the structural stability of the first protrusion 23, as well as the pressure limiting effect of the first protrusion 23 on the inner tube 1. The number of first protrusions 23 is preferably 2 to 6, specifically 3, 4, 5 or 6.

[0056] In one embodiment, the first protrusion 23 is an arc-shaped protrusion. The arc-shaped protrusion can ensure the tightness of the inner tube 1 while also being easier to process. It is worth noting that when the inner tube 1 and the outer tube 2 are assembled in place, that is, when the water outlet end of the outer tube 2 abuts against the mounting boss 12, the first protrusion 23 is formed by locally stamping the outer tube 2. This ensures that the first protrusion 23 tightly abuts against the inner tube 1 while avoiding assembly interference caused by stamping the first protrusion 23 before assembly, thus ensuring assembly efficiency.

[0057] The distance between the first protrusion 23 and the water outlet end of the inner tube 1 is d, where d ≥ 5 mm, to prevent the end of the inner tube 1 from being pressed against by the first protrusion 23 and undergoing large deformation. Furthermore, d ≤ 50 mm, so that the first protrusion 23 is positioned close to the water outlet end of the inner tube 1, thereby preventing the free end of the inner tube 1 from being misaligned relative to the outer tube 2, and better ensuring the coaxiality between the inner tube 1 and the outer tube 2.

[0058] In one embodiment, the outer pipe 2 includes a pipe body 21 with open ends and an end plate 22 connected to the second end of the pipe body 21. The end plate 22 closes the open ends of the second end of the pipe body 21. The end plate 22 and the pipe body 21 are separate components. The first end of the pipe body 21 abuts against the mounting boss 12, and the outer wall of the pipe body 21 is provided with an outlet 211. By processing the end plate 22 and the pipe body 21 separately, it is beneficial to simplify the processing of the pipe body 21 and reduce the processing cost of the pipe body 21. The end plate 22 is preferably welded to the pipe body 21 to better ensure the sealing of the second end of the outer pipe 2. In other embodiments, the end plate 22 and the pipe body 21 can also be connected by threads or by other detachable and sealed structures.

[0059] To further ensure the coaxiality of the inner tube 1 and the outer tube 2, in one embodiment, a positioning boss 24 extends radially outward from the first end of the outer tube 2. The positioning boss 24 abuts against the mounting boss 12, thereby increasing the contact area between the outer tube 2 and the inner tube 1 at the ends, thus reducing the probability of the outer tube 2 being misaligned relative to the inner tube 1 during assembly and improving the assembly efficiency of the water inlet assembly 100. The outer diameter of the positioning boss 24 is preferably smaller than the outer diameter of the mounting boss 12 to avoid interference with the mounting housing 3 caused by the positioning boss 24 extending radially outward from the mounting boss 12.

[0060] To ensure smooth water flow and sufficient flow rate, multiple outlets 211 are spaced apart along the circumference of the outer pipe 2. In one embodiment, two outlets 211 are arranged opposite each other to reduce the processing difficulty of the outer pipe 2. In other embodiments, the number of outlets 211 may be three or more. The shape of the outlets 211 may be, but is not limited to, rectangular, V-shaped, or other shapes.

[0061] like Figures 4 to 8As shown, in one embodiment, the water inlet assembly 100 further includes a water guide shroud 4. The first end of the water guide shroud 4 is open, the outer pipe 2 passes through the second end of the water guide shroud 4, and the outlet 211 is located inside the water guide shroud 4. Thus, the water flowing out from the outlet 211 enters the water guide shroud 4 and flows through the outlet opening of the water guide shroud 4 into the inner tank 300. Since the hot water in the inner tank 300 is usually in the upper layer, setting the outlet opening of the water guide shroud 4 downwards allows the water flowing out of the water guide shroud 4 to flow downwards as much as possible, avoiding affecting the upper layer of hot water in the inner tank 300, thereby preventing the cold water from mixing with the upper layer of hot water and ensuring the outlet temperature of the upper layer of hot water. Furthermore, the lower end of the water guide shroud 4 is positioned close to the upper end of the mounting housing 3 to avoid interference between the water guide shroud 4 and the inner tank 300, while lowering the position of the outlet opening, further reducing the disturbance of the cold water from the inlet to the existing water in the inner tank 300.

[0062] To improve the assembly reliability of the water guide cover 4 and the outer pipe 2, in one embodiment, the water guide cover 4 includes a flow guide cover portion 41 and a mounting sleeve portion 42 coaxially connected. The end of the flow guide cover portion 41 away from the mounting sleeve portion 42 is open to form a water outlet opening. The cross-sectional area of ​​the flow guide cover portion 41 is larger than the cross-sectional area of ​​the mounting sleeve portion 42. The water outlet 211 of the outer pipe 2, which is sealed and inserted into the mounting sleeve portion 42, is located inside the flow guide cover portion 41. This arrangement can increase the contact area between the water guide cover 4 and the outer pipe 2 through the mounting sleeve portion 42, thereby improving the assembly stability and reliability of the two. By setting the flow guide cover portion 41, the water guiding effect of the water guide cover 4 can be guaranteed.

[0063] In one embodiment, the flow guide shroud 41 has a frustoconical structure, and the cross-sectional area of ​​the flow guide shroud 41 gradually increases from top to bottom, which facilitates the downward convergence and guidance of water flow and improves the smoothness of water discharge. The diameter of the mounting sleeve 42 is equal everywhere.

[0064] To improve the stability of the water guide cover 4 and the outer tube 2, in one embodiment, a positioning groove 25 is formed by a partial inward concavity on the outer side wall of the outer tube 2, and a second protrusion 422 is provided on the inner wall of the mounting sleeve 42, which is engaged in the positioning groove 25. By providing the cooperation of the second protrusion 422 and the positioning groove 25, the assembly stability and reliability of the two in the axial and circumferential directions can be guaranteed, preventing the water guide cover 4 from sliding axially relative to the outer tube 2 and falling off the outer tube 2, and preventing the water guide cover 4 from rotating circumferentially relative to the outer tube 2 and causing the water flow to generate vortices.

[0065] In one embodiment, the sidewall of the mounting sleeve 42 has a retaining plate 421. One end of the retaining plate 421 near the flow guide shroud 41 is connected to the main structure of the mounting sleeve 42, and the other opposite end of the retaining plate 421 is freely disposed. Optionally, both sides of the retaining plate 421 along the circumferential direction of the mounting sleeve 42 are separated from the main structure, and a second protrusion 422 is disposed on the retaining plate 421. This allows the retaining plate 421 to swing relative to the main structure, so that the second protrusion 422 can be engaged into the positioning groove 25 by pressing the retaining plate 421 in the direction toward the outer tube 2. While avoiding the second protrusion 422 from hindering the assembly of the water guide shroud 4 and the outer tube 2, the assembly efficiency of the water guide shroud 4 and the outer tube 2 is ensured.

[0066] In one embodiment, a rib 43 protrudes from the outer side wall of the flow guide 41. The rib 43 facilitates user operation of the flow guide 41 during assembly, improving assembly efficiency. Preferably, one rib 43 is provided on each of the opposite sides of the flow guide 41 to facilitate user gripping of the rib 43.

[0067] Example 2

[0068] This embodiment provides a water inlet component 100, and the water inlet component 100 provided in this embodiment has a basically the same structure as that in the above embodiments, with only some differences in settings. This embodiment will not repeat the same content.

[0069] like Figure 9 and Figure 10 As shown, in this embodiment, an outlet 211 is provided on the side wall of the outer tube 21. The outlet 211 is arranged in multiple rows along the circumference of the outer tube 2. Each row includes multiple outlets 211 arranged at intervals along the axial direction of the outer tube 2. The outlet 211 has a V-shaped structure with its opening facing the mounting shell 3.

[0070] The above structure can increase the water flow rate while reducing the size of a single outlet 211, thereby increasing the water flow rate of the inlet component 100 and ensuring smooth water flow.

[0071] In this embodiment, the inner tube 1 includes a main pipe section 11. The inlet end of the main pipe section 11 protrudes radially outwards, and a fitting section 13 and a mounting boss 12 are provided. One end of the fitting section 13 is connected to the mounting boss 12. The first end of the outer tube 2 is fitted onto the fitting section 13 with a clearance or interference fit. The fitting section 13 improves the assembly accuracy of the outer tube 2 and the inner tube 1, further reducing the probability of the outer tube 2 deviating from the inner tube 1.

[0072] Example 3

[0073] This embodiment provides a water heater, such asFigure 11 As shown, it includes an inner tank 300, a heating device, a water inlet assembly 100, and a water outlet assembly 200. The heating device is used to heat the water in the inner tank 300. The inner tank 300 has a water inlet and a water outlet. The water inlet assembly 100 is detachably installed at the water inlet, and the inner tube 1 and outer tube 2 extend into the inner tank 300. The water outlet assembly 200 is detachably installed in the water outlet.

[0074] The water inlet component 100 adopts the structure of the water inlet component 100 in any of the above embodiments, and the water outlet component 200 adopts the structure of the water outlet component 200 in the prior art. This embodiment does not limit or elaborate on the specific structure of the water outlet component 200.

[0075] The water heater provided in this embodiment, by adopting the above-mentioned water inlet component 100, can improve the smoothness and stability of water inlet, ensure the water inlet flow, simplify the structure of the water heater, and reduce the cost of the water heater.

[0076] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0077] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A water inlet assembly, characterized in that, The water inlet assembly comprises an inner pipe (1) and an outer pipe (2) arranged outside the inner pipe (1), the water inlet end of the inner pipe (1) is outwardly protrudingly provided with a mounting boss (12), the first end side wall of the outer pipe (2) is provided with a water outlet (211) and the second end is closed, the first end of the outer pipe (2) abuts against the mounting boss (12), and the water outlet end of the inner pipe (1) communicates with the inner cavity of the outer pipe (2); the inner wall of the outer pipe (2) is protrudingly provided with a first protruding block (23), at least two first protruding blocks (23) are arranged along the circumference of the inner pipe (1), and the first protruding block (23) abuts against the inner pipe (1).

2. The water inlet assembly of claim 1, wherein, The first protruding block (23) is integrally arranged with the pipe body (21) of the outer pipe (2); And / or, the first protruding block (23) is an arc-shaped protruding block; And / or, the spacing between the first protruding block (23) and the water outlet end of the inner pipe (1) is d, and 5mm≤d≤50mm.

3. The water inlet assembly of claim 1, wherein, The first end of the outer pipe (2) extends radially outwardly and is provided with a positioning boss (24), and the positioning boss (24) abuts against the mounting boss (12); And / or, the inner pipe (1) comprises a main pipe portion (11), the water inlet end of the main pipe portion (11) is outwardly protrudingly provided with a plug-in portion (13) and the mounting boss (12), one end of the plug-in portion (13) is connected with the mounting boss (12), and the first end of the outer pipe (2) is arranged in the plug-in portion (13).

4. The water inlet assembly of claim 1, wherein, The outer pipe (2) comprises a pipe body (21) with two open ends and an end plate (22) arranged at one end of the pipe body (21), the pipe body (21) is provided with the first protruding block (23) and the water outlet (211), and the end plate (22) is welded or detachably and sealingly connected with the pipe body (21); And / or, the water outlet end of the inner pipe (1) is open, and the closed end of the outer pipe (2) is arranged in the spacing of the water outlet end of the inner pipe (1).

5. The water inlet assembly according to any one of claims 1-4, characterized in that, The water inlet assembly further comprises a water guide cover (4), the first end of the water guide cover (4) is open, the second end of the water guide cover (4) is penetrated by the outer pipe (2), and the water outlet (211) is located in the water guide cover (4).

6. The water inlet assembly of claim 5, wherein, The water guide cover (4) comprises a mounting sleeve portion (42) and a flow guide cover portion (41) coaxially connected, the flow guide cover portion (41) is open at the end away from the mounting sleeve portion (42), the cross-sectional area of the flow guide cover portion (41) is greater than that of the mounting sleeve portion (42), the outer pipe (2) is sealingly arranged in the mounting sleeve portion (42), and the water outlet (211) is located in the flow guide cover portion (41).

7. The water inlet assembly of claim 6, wherein, The inner wall of the mounting sleeve portion (42) is protrudingly provided with a second protruding block (422), the outer wall of the outer pipe (2) is inwardly recessed with a positioning recess (25), and the second protruding block (422) is clamped into the positioning recess (25).

8. The water inlet assembly of claim 7, wherein, The side wall of the mounting sleeve part (42) has a clamping plate part (421) connected to the main body structure of the mounting sleeve part (42) near one end of the fairing part (41), and the other end of the clamping plate part (421) is freely arranged, and the second convex part (422) is protrudingly arranged on the inner side of the clamping plate part (421).

9. The water inlet assembly of any one of claims 1-4, wherein, The water inlet assembly further comprises a mounting shell (3) having a water inlet channel (31) therethrough, and the water outlet end of the mounting shell (3) has a positioning ring groove (32) arranged around the water inlet channel (31), and the mounting boss (12) is inserted into the positioning ring groove (32).

10. A water heater comprising an inner tank (300), characterized in that, The water inlet assembly further comprises an inner tube (1) and an outer tube (2) located in the inner container (300).

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